1 /* 2 * sec-core.c 3 * 4 * Copyright (c) 2012 Samsung Electronics Co., Ltd 5 * http://www.samsung.com 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 * 12 */ 13 14 #include <linux/module.h> 15 #include <linux/moduleparam.h> 16 #include <linux/init.h> 17 #include <linux/err.h> 18 #include <linux/slab.h> 19 #include <linux/i2c.h> 20 #include <linux/of_irq.h> 21 #include <linux/interrupt.h> 22 #include <linux/pm_runtime.h> 23 #include <linux/mutex.h> 24 #include <linux/mfd/core.h> 25 #include <linux/mfd/samsung/core.h> 26 #include <linux/mfd/samsung/irq.h> 27 #include <linux/mfd/samsung/rtc.h> 28 #include <linux/mfd/samsung/s2mps11.h> 29 #include <linux/mfd/samsung/s5m8763.h> 30 #include <linux/mfd/samsung/s5m8767.h> 31 #include <linux/regmap.h> 32 33 static struct mfd_cell s5m8751_devs[] = { 34 { 35 .name = "s5m8751-pmic", 36 }, { 37 .name = "s5m-charger", 38 }, { 39 .name = "s5m8751-codec", 40 }, 41 }; 42 43 static struct mfd_cell s5m8763_devs[] = { 44 { 45 .name = "s5m8763-pmic", 46 }, { 47 .name = "s5m-rtc", 48 }, { 49 .name = "s5m-charger", 50 }, 51 }; 52 53 static struct mfd_cell s5m8767_devs[] = { 54 { 55 .name = "s5m8767-pmic", 56 }, { 57 .name = "s5m-rtc", 58 }, 59 }; 60 61 static struct mfd_cell s2mps11_devs[] = { 62 { 63 .name = "s2mps11-pmic", 64 }, { 65 .name = "s2mps11-clk", 66 } 67 }; 68 69 #ifdef CONFIG_OF 70 static struct of_device_id sec_dt_match[] = { 71 { .compatible = "samsung,s5m8767-pmic", 72 .data = (void *)S5M8767X, 73 }, 74 { .compatible = "samsung,s2mps11-pmic", 75 .data = (void *)S2MPS11X, 76 }, 77 {}, 78 }; 79 #endif 80 81 int sec_reg_read(struct sec_pmic_dev *sec_pmic, u8 reg, void *dest) 82 { 83 return regmap_read(sec_pmic->regmap, reg, dest); 84 } 85 EXPORT_SYMBOL_GPL(sec_reg_read); 86 87 int sec_bulk_read(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf) 88 { 89 return regmap_bulk_read(sec_pmic->regmap, reg, buf, count); 90 } 91 EXPORT_SYMBOL_GPL(sec_bulk_read); 92 93 int sec_reg_write(struct sec_pmic_dev *sec_pmic, u8 reg, u8 value) 94 { 95 return regmap_write(sec_pmic->regmap, reg, value); 96 } 97 EXPORT_SYMBOL_GPL(sec_reg_write); 98 99 int sec_bulk_write(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf) 100 { 101 return regmap_raw_write(sec_pmic->regmap, reg, buf, count); 102 } 103 EXPORT_SYMBOL_GPL(sec_bulk_write); 104 105 int sec_reg_update(struct sec_pmic_dev *sec_pmic, u8 reg, u8 val, u8 mask) 106 { 107 return regmap_update_bits(sec_pmic->regmap, reg, mask, val); 108 } 109 EXPORT_SYMBOL_GPL(sec_reg_update); 110 111 static bool s2mps11_volatile(struct device *dev, unsigned int reg) 112 { 113 switch (reg) { 114 case S2MPS11_REG_INT1M: 115 case S2MPS11_REG_INT2M: 116 case S2MPS11_REG_INT3M: 117 return false; 118 default: 119 return true; 120 } 121 } 122 123 static bool s5m8763_volatile(struct device *dev, unsigned int reg) 124 { 125 switch (reg) { 126 case S5M8763_REG_IRQM1: 127 case S5M8763_REG_IRQM2: 128 case S5M8763_REG_IRQM3: 129 case S5M8763_REG_IRQM4: 130 return false; 131 default: 132 return true; 133 } 134 } 135 136 static struct regmap_config sec_regmap_config = { 137 .reg_bits = 8, 138 .val_bits = 8, 139 }; 140 141 static struct regmap_config s2mps11_regmap_config = { 142 .reg_bits = 8, 143 .val_bits = 8, 144 145 .max_register = S2MPS11_REG_L38CTRL, 146 .volatile_reg = s2mps11_volatile, 147 .cache_type = REGCACHE_FLAT, 148 }; 149 150 static struct regmap_config s5m8763_regmap_config = { 151 .reg_bits = 8, 152 .val_bits = 8, 153 154 .max_register = S5M8763_REG_LBCNFG2, 155 .volatile_reg = s5m8763_volatile, 156 .cache_type = REGCACHE_FLAT, 157 }; 158 159 static struct regmap_config s5m8767_regmap_config = { 160 .reg_bits = 8, 161 .val_bits = 8, 162 163 .max_register = S5M8767_REG_LDO28CTRL, 164 .volatile_reg = s2mps11_volatile, 165 .cache_type = REGCACHE_FLAT, 166 }; 167 168 #ifdef CONFIG_OF 169 /* 170 * Only the common platform data elements for s5m8767 are parsed here from the 171 * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and 172 * others have to parse their own platform data elements from device tree. 173 * 174 * The s5m8767 platform data structure is instantiated here and the drivers for 175 * the sub-modules need not instantiate another instance while parsing their 176 * platform data. 177 */ 178 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata( 179 struct device *dev) 180 { 181 struct sec_platform_data *pd; 182 183 pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); 184 if (!pd) { 185 dev_err(dev, "could not allocate memory for pdata\n"); 186 return ERR_PTR(-ENOMEM); 187 } 188 189 /* 190 * ToDo: the 'wakeup' member in the platform data is more of a linux 191 * specfic information. Hence, there is no binding for that yet and 192 * not parsed here. 193 */ 194 195 return pd; 196 } 197 #else 198 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata( 199 struct device *dev) 200 { 201 return 0; 202 } 203 #endif 204 205 static inline int sec_i2c_get_driver_data(struct i2c_client *i2c, 206 const struct i2c_device_id *id) 207 { 208 #ifdef CONFIG_OF 209 if (i2c->dev.of_node) { 210 const struct of_device_id *match; 211 match = of_match_node(sec_dt_match, i2c->dev.of_node); 212 return (int)match->data; 213 } 214 #endif 215 return (int)id->driver_data; 216 } 217 218 static int sec_pmic_probe(struct i2c_client *i2c, 219 const struct i2c_device_id *id) 220 { 221 struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev); 222 const struct regmap_config *regmap; 223 struct sec_pmic_dev *sec_pmic; 224 int ret; 225 226 sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev), 227 GFP_KERNEL); 228 if (sec_pmic == NULL) 229 return -ENOMEM; 230 231 i2c_set_clientdata(i2c, sec_pmic); 232 sec_pmic->dev = &i2c->dev; 233 sec_pmic->i2c = i2c; 234 sec_pmic->irq = i2c->irq; 235 sec_pmic->type = sec_i2c_get_driver_data(i2c, id); 236 237 if (sec_pmic->dev->of_node) { 238 pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev); 239 if (IS_ERR(pdata)) { 240 ret = PTR_ERR(pdata); 241 return ret; 242 } 243 pdata->device_type = sec_pmic->type; 244 } 245 if (pdata) { 246 sec_pmic->device_type = pdata->device_type; 247 sec_pmic->ono = pdata->ono; 248 sec_pmic->irq_base = pdata->irq_base; 249 sec_pmic->wakeup = pdata->wakeup; 250 sec_pmic->pdata = pdata; 251 } 252 253 switch (sec_pmic->device_type) { 254 case S2MPS11X: 255 regmap = &s2mps11_regmap_config; 256 break; 257 case S5M8763X: 258 regmap = &s5m8763_regmap_config; 259 break; 260 case S5M8767X: 261 regmap = &s5m8767_regmap_config; 262 break; 263 default: 264 regmap = &sec_regmap_config; 265 break; 266 } 267 268 sec_pmic->regmap = devm_regmap_init_i2c(i2c, regmap); 269 if (IS_ERR(sec_pmic->regmap)) { 270 ret = PTR_ERR(sec_pmic->regmap); 271 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 272 ret); 273 return ret; 274 } 275 276 sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR); 277 i2c_set_clientdata(sec_pmic->rtc, sec_pmic); 278 279 if (pdata && pdata->cfg_pmic_irq) 280 pdata->cfg_pmic_irq(); 281 282 sec_irq_init(sec_pmic); 283 284 pm_runtime_set_active(sec_pmic->dev); 285 286 switch (sec_pmic->device_type) { 287 case S5M8751X: 288 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs, 289 ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL); 290 break; 291 case S5M8763X: 292 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs, 293 ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL); 294 break; 295 case S5M8767X: 296 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs, 297 ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL); 298 break; 299 case S2MPS11X: 300 ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs, 301 ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL); 302 break; 303 default: 304 /* If this happens the probe function is problem */ 305 BUG(); 306 } 307 308 if (ret) 309 goto err; 310 311 return ret; 312 313 err: 314 sec_irq_exit(sec_pmic); 315 i2c_unregister_device(sec_pmic->rtc); 316 return ret; 317 } 318 319 static int sec_pmic_remove(struct i2c_client *i2c) 320 { 321 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c); 322 323 mfd_remove_devices(sec_pmic->dev); 324 sec_irq_exit(sec_pmic); 325 i2c_unregister_device(sec_pmic->rtc); 326 return 0; 327 } 328 329 static const struct i2c_device_id sec_pmic_id[] = { 330 { "sec_pmic", 0 }, 331 { } 332 }; 333 MODULE_DEVICE_TABLE(i2c, sec_pmic_id); 334 335 static struct i2c_driver sec_pmic_driver = { 336 .driver = { 337 .name = "sec_pmic", 338 .owner = THIS_MODULE, 339 .of_match_table = of_match_ptr(sec_dt_match), 340 }, 341 .probe = sec_pmic_probe, 342 .remove = sec_pmic_remove, 343 .id_table = sec_pmic_id, 344 }; 345 346 static int __init sec_pmic_init(void) 347 { 348 return i2c_add_driver(&sec_pmic_driver); 349 } 350 351 subsys_initcall(sec_pmic_init); 352 353 static void __exit sec_pmic_exit(void) 354 { 355 i2c_del_driver(&sec_pmic_driver); 356 } 357 module_exit(sec_pmic_exit); 358 359 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); 360 MODULE_DESCRIPTION("Core support for the S5M MFD"); 361 MODULE_LICENSE("GPL"); 362